
.ob svg {
  font: 10px sans-serif;
}

.ob path {
  -webkit-transition: fill-opacity 250ms linear;
}

.selecting path {
  fill-opacity: .2;
}

.selecting path.selected {
  stroke: #f00;
  stroke-width: 2px;
}

.axis path, .axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.brush .extent {
  stroke: #fff;
  fill-opacity: .125;
  shape-rendering: crispEdges;
}